I last synchronized them in 2007. But I haven't had them checked lately.
I have 35k miles. The carbs haven't been overhauled either. I don't know if they were rejetted either? Stock air box with a K&N filter though.
I can get the RPM's up in lower gears (I think) but upper gears like 4 and 5 it cuts out and bogs. I have been smelling gas real bad during and a little after I fixed the choke problem. I could have fouled a plug. I wasn't riding it hard enough to do anything with that extra gas.
I think I am going to have to open everything back up and look
.